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Android Game Programming By Example

You're reading from   Android Game Programming By Example Harness the power of the Android SDK by building three immersive and captivating games

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Product type Paperback
Published in Jun 2015
Publisher
ISBN-13 9781785280122
Length 388 pages
Edition 1st Edition
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Author (1):
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John Horton John Horton
Author Profile Icon John Horton
John Horton
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Table of Contents (13) Chapters Close

Preface 1. Player 1 UP FREE CHAPTER 2. Tappy Defender – First Step 3. Tappy Defender – Taking Flight 4. Tappy Defender – Going Home 5. Platformer – Upgrading the Game Engine 6. Platformer – Bob, Beeps, and Bumps 7. Platformer – Guns, Life, Money, and the Enemy 8. Platformer – Putting It All Together 9. Asteroids at 60 FPS with OpenGL ES 2 10. Move and Draw with OpenGL ES 2 11. Things That Go Bump – Part II Index

Drawing at 60 + FPS


In three simple steps, we will be able to glimpse our spaceship:

  • Add a SpaceShip object to the GameManager member variables:

    private boolean playing = false;
    
      // Our first game object
         SpaceShip ship;
    
         int screenWidth;
  • Add a call to the new SpaceShip() to the createObjects method:

    private void createObjects() {
            
      // Create our game objects
      // First the ship in the center of the map
         gm.ship = new SpaceShip(gm.mapWidth / 2, gm.mapHeight / 2);
    }
  • Add the call to draw the spaceship in each frame in the draw method of AsteroidsRenderer:

    // Start drawing!
    // Draw the ship
    gm.ship.draw(viewportMatrix);
    

Run the game and see the output:

Not exactly impressive visuals, but it is running between 67 and 212 frames per second in debug mode while outputting to the console on an ageing Samsung Galaxy S2 phone.

It will be our aim throughout the project to add hundreds of objects and keep the frames per second over 60.

Tip

One of the book's reviewers reported frame rates...

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